<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>post提交数据</title>
</head>
<body>
<form action="/ps" method="post">
    用户名：<input type="text" name="username" id=""><br>
    密码：<input type="password" name="password"><br>
    <button type="submit">提交</button>
</form>
</body>
</html>